Cloud computing provides on-demand access to computer resources like storage and computing power without direct management by users. It relies on sharing resources across locations to achieve coherence, typically using a pay-as-you-go pricing model. Common uses of cloud computing today include data backup, disaster recovery, email, virtual desktops, software development, big data analytics, and web applications. Cloud services are offered as infrastructure, platforms, software, mobile backends, and serverless computing on private, public, or hybrid clouds. The advantages of cloud computing include reduced capital expenses through the pay-as-you-go model and flexibility to scale resources up or down as needed.
2. • Cloud computing the on-demand availability of computer system resources,
especially data storage (cloud storage) and computing power, without direct active
management by the user. Large clouds often have functions distributed over multiple
locations, each location being a data center. Cloud computing relies on sharing of resources
to achieve coherence and typically using a "pay-as-you-go" model which can help in
reducing capital expenses but may also lead to unexpected operating expenses for unaware
users.
COMPUTING USED FOR TODAY:
• data backup
• disaster recovery
• email
• virtual desktops
• software development and testing
• big data analytics
• customer-facing web applications.
3. Service models
• Infrastructure as a service (IaaS)
• Platform as a service (PaaS)
• Software as a service (SaaS)
• Mobile "backend" as a service (MBaaS)
• Serverless computing or Function-as-a-Service (FaaS)
